VXICacheStream.cpp
上传用户:xqtpzdz
上传日期:2022-05-21
资源大小:1764k
文件大小:3k
源码类别:
xml/soap/webservice
开发平台:
Visual C++
- /****************License************************************************
- * Vocalocity OpenVXI
- * Copyright (C) 2004-2005 by Vocalocity, Inc. All Rights Reserved.
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- * Vocalocity, the Vocalocity logo, and VocalOS are trademarks or
- * registered trademarks of Vocalocity, Inc.
- * OpenVXI is a trademark of Scansoft, Inc. and used under license
- * by Vocalocity.
- ***********************************************************************/
- /***********************************************************************
- *
- * Routines to handle caching of documents and resources.
- *
- ***********************************************************************/
- #include "VXICacheStream.hpp"
- VXICacheStream::VXICacheStream(VXIcacheInterface * cache,
- const VXIbyte * buffer,
- VXIulong bufferSize)
- : writable(false), bad(false), stream(NULL), cache(NULL)
- {
- if (cache == NULL || buffer == NULL || bufferSize == 0) {
- bad = true;
- return;
- }
- VXIcacheStream * stream = NULL;
- VXIcacheResult rc = cache->OpenEx(cache, L"VXI", buffer, bufferSize,
- CACHE_MODE_READ_CREATE, CACHE_FLAG_NULL,
- NULL, NULL, &stream);
- switch (rc) {
- case VXIcache_RESULT_ENTRY_CREATED: // We have write permission.
- writable = true;
- break;
- case VXIcache_RESULT_SUCCESS: // Already in cache, just read it in.
- writable = false;
- break;
- default:
- bad = true;
- return;
- }
- this->cache = cache;
- this->stream = stream;
- return;
- }
- void VXICacheStream::CommitEntry()
- {
- if (cache != NULL && stream != NULL && writable) {
- cache->CloseEx(cache, true, &stream);
- stream = NULL; // just in case
- }
- }
- void VXICacheStream::DiscardEntry()
- {
- if (cache != NULL && stream != NULL && writable) {
- cache->CloseEx(cache, false, &stream);
- stream = NULL; // just in case
- }
- }
- VXICacheStream::~VXICacheStream()
- {
- if (cache == NULL || stream == NULL) return;
- cache->CloseEx(cache, !writable, &stream);
- }